You can create reference copies of objects that are updated automatically when you change the original object. You can add identical objects, such as columns, to your drawing.
An AEC entity reference is a reference copy of an object. These entity references update when you change the original object. When you select an object to reference, you must specify a point on the original object as an insertion point for the marker of the entity reference. A reference marker is displayed in the drawing to mark the insertion point.
You can place the entity reference in the drawing at any location or rotation angle. The distance between the entity reference and the reference marker remains equal to the distance between the original object and the insertion point specified. You can change this distance by specifying a new insertion point at a new location in relation to the original object.
When you change the properties of the original object or edit it with grips, the reference object reflects the changes. For example, if you want to add custom-shaped mass elements to a drawing, you can add one mass element and reference it. If you make changes to the original, the entity reference is updated.